Electric-arc lamp.



No. 677,0!9. 1 Patented June 25, I90l. F. M. CONWAY.

ELECTRIC ABC LAMP.

(Application filed July 18, 1898.,

3 Sheets-Sheet I.

(No Model.)

INVENTOR ATTORNEY n I m" m: Nouns an 0. "magnum. wnsmnavou. mc.

No. 677,019. I Patented lune 25, l90l'.

F.. M. CONWAY.

ELECTRIC ARC LAMP. (A ucazion filed July 18, 1898. (No Model.) 3 Sheets-Sheet 2.

WITNESSES: INVENTOR ATTORNEY No. 677,0!9. Patented June 25, I901. F. M. CONWAY.

ELECTRIC ARC LAMP.

Application filed July 18, 189B.| (No Model.) 3 Sheets-Sh eei 3.

i I l nuumnmumuuuw UNIT D STATES.

PATENT FFICE.

FRANKMQ CONWAY, on NEW YORK, N. ASSIGNOR To THE IMPERIAL ELECTRIC LAMP COMPANY, or SAME PLACE.

"ELECTRIC-,JARC LAMP.

- err-cinnamon forming part of Letters Iatent No. 677,019, dated June 25, 1901/ Application filed July 18, 1898. Serial No. 686,244- (No model.)

improvements "relate especially to an alternating-current lamp, as illustrated in the acf companying drawings, in which- Figure 1 is a front view of the lamp. Fig

2 is a rear view of portions thereof on a larger scale. Fig. 3 is a side View of the same. Figs. 4 and 5 are respectively a side and a rear view of portions of the automatic feed apparatus on a still larger scale. Fig. .6 is a plan of the same parts represented in Fig. 5, showing the carbon and the central tube of the fixed frame in section. V Fig. 7 isa vertical section of the cap of the inclosing globe, showing a self-adjusting guide and packing for the carbon. Fig. 8 is a horizontal section on the line 8, Fig. 7. Figs. 9, 10, 11 and 12 are detail views of a self-centering clamp and support forthe annular reactance-coil hereinafter described.

Fig. 13 is a vertical section, also on a larger scale, of the socket or support for the fixed carbon and an insulated screw-stud connect- 7 ed therewith for the reception of the outerglobe support.

In describing the drawings I have usedthe terms front and."rear merely for the purpose of distinction and not to indicate that one face is more the front of the lamp than the other.

, In an alternating-currentlamp I employ a 'withone pole of the solenoid 3, from the other pole of which a conducting-wire passes to the fixed central tube 2 of the frame in which the moving carbon 0 works. From the support of the fixed carbon 0 a conducting-Wire "L0 is carried up through thetubular' hanger The an 4 and to the other binding-post n.

nularreactance-coil 1 restsin horizontal porespectively. 7 shown in elevation and plan, respectively, in

sition upon a bracket 5, constructed with radial arms, preferably three in number, supported on the central hanger 2 of the frame. This horizontal annular reactance-coil is secured in position by a cap-frame 6, having radial arms 7, which bear on the coil, and a.

central hub 8 for centering it, above which is a clamp-nut 9, engaging with a screw-thread on the exterior of the central frame-hanger 2 Insulating and heat-resisting pads or packings 10 and 10 of asbestos are interposed between the coil 1 and the bracket 5 and cap 6, The supporting-bracket 5 is Figs. 11 and 12. The cap-frame 6 is shown in elevation and plan,.respectively, in Figs. 9

and '10. This mode of supporting and clamping the annular reactance-coil is of great utility in dispensing with the necessity of perforating the coil with screw-bolts or the like for securing it in position.

The solenoid 3 is preferably formed of a :pair of vertical coils located on one side of the suspension-tube 2*", having tubular cores and receiving the vertical arms 11 of an armae ture12,'of U form, made up of a cluster of iron plates' and connected by a rod 13 and cushion-springs 14, with'an arm 15 projecting from the vertically-sliding frame 16, from which the upper movable carbon 0 is suspended by means of a clutch of peculiar con- My improved clutch, which regulates auto- .matically'the feed of the movable carbon, is constructed with three radial lever-jaws 18,

gripping the carbon 0 inwardly or with radial pressure, said jaws being mounted by fulcrum-pins 19 in a ring 20, and the outer ends of the saidradial levers 18 being connected by pivots 21 to links 22, which are attached by pivots 23 to an upper ring 24:, connected by suspension-rods 25 to the sliding frame 16. When the lamp is not in operation and the solenoid dead, the clutch and its frame rest by gravity upon the stationary ring 26, forming the cap or cover of the protectingglobev 27, the Weight of the sliding frame 16 and the attachments 25 24 22 upon the outer ends of: the radial levers 18 depressing the outer ends of the said leverslsoas to lift their inner endtrawayfrom thecarbonc and allow this to drop upon the fiXedcarbon but as soon as the solenoidis excited the electromagnetism raising the armature 12 in custernary manner lifts the clll'tch levers 18 by their outer ends, causing their inner ends to grip the carbon a tightly, raising itfrom con-- tact with the lower carbon 0'', when the dis-' tance of the arc is regulated in the usual way under antoinatic control of the current. The

' constructionof the clutch with three radiallymoving clutching-points renders it SQIfrQQIl' tering on the round carbon, and thusadapts it'to clutch the carbon automatically and more'eifectively than a clutch with only .two

' vor mor tha ree (stitching-p nts T e cushiomsprings 14 prevent any sudden movement'being imparted to the adjustabl arban by the movement o t e a mature, and on the opposite side of the frame from the armature connection is a da h-pot? to regt late and prevent too sudden a sent of th frame in a customary manner, The. carbon 0 where it passes through he an u ar plate 26 is surrounded by a paekingil, F g, 7, haw ing free pl y hori n al y in a 'direotions within a cup 3l, formed. in he p a e 26, t e central aperture the ei through hich he carbon passes-being made of some hat arge 1 diameter than the carbon, as sh wn in Fig- 7- The packing 30 is cove ed by a-flange cap 32:01: la g ternal d ameter than the packing 3 an avinga centra pe ture o la ger iameter than e carbon so as tolen e' he carbon 0 and ts packing ee o move slightly in any horizontal direction,as already stated, thus p vi ing a self adjusting sun,-

porting-cap o he nc s ng glohee The lower fixe "carb n eis o n ed n a socket 33, Fig. 13, screwed into the center of the coupling 34, Which is connected by the b la ha ge s t 1. t Plate ecured to the framey2, The head-38 of the screw-socket 33 has the inverted-cup form shown in Fig. '13 for the reception of the head of the suspension -screw 39, on which is screwed the support 40 for the external globe 41, In order to insulatetheexternal-globe support 40 fron'1 the screw-socket33 38 sentedin Fig.13'."

Having thus'de'scribed my invention, the.

hrough which the current passes ro e vfixed carbon 0, I ploy inshla ng h s 42 above the head of the suspension-screw 39 and theannular insulating-packing 43 below the head supported by a washer 44, which is fixed in p ion. y turn g in the b to flange of the cup-fo rmedhead 38, as'repre following is what I claim as new therein and desire to secure' by Letters Patent I 1. The combination of the annular reactaneeecoil 1 central hanger 2 armed support- I ing-bracket 5, centering-cap ,6, clamp-nut 9 and suitable packing 10, 10, substantially as andfor the purpose set forth.

2. The flower-ca bon-supportersoeket 33 constructed with a ohp shaped head 38 in comb ation with the 'snspensiomscrew 39 and suppo t 40 for the exte na globee and llsu atins -paokings 42, l3, preve ting eenduo lon bet een said oa o' soeket 33ands s pension-screw 39 substantially as explained,

3-, In an electric-arc lamp, the combina ion of a cen ral larnn ha g r, a solenoid fixed to said c nt al lamp=hange 'and'hav ng verti eallyemovahle cores, a slidi grame ltmov d' i ve'rtiea ly by said cores, togglewlnteh levers 1. 22, ppo ted at th' lo' er end ofi sa r m '6, a fl a nsfulernin -ring 20 in whi the, e uteh members 8 o the toggle olutch levers are fulo nmed at p ints ne t mov able ca bon o the lamp} and a fixed arrest g=ring 26 supported from h lamp=hang r;

substanti ya and for he pu poses setiorth',

4;. an e ec ic-ar lanai the combinat n I of a central lamp-hanger, a bracket 5 project.- I

ing o t a dly and upwardly f o said, lainp h nger a. eactanee-co l l of an u a orin ir round ng the c ntral lamp-hang rand rest:

ing upon the bracket 5 anda clamping=ap6 having threaded connection with the central lamp-hanger and bearing against thereactnte-c l o hold it upo its, .pll tingbracket; substantially as he ein set r h FRANK M. CONWAY. v

Witnesses I FRANK BECK,' JOSEF'WURM. j 

